Saw-filing device.



W. T.0HARA.

SAI/V FILING DEVICE. APPLICATION man Amm, 1914.

Patented Apr. 2o, 1915.

Z SHEETS-SHEET 1.

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vv. T. o'HARA. V

SAW FILING DEVICE. APPLICATION FILED APILZT. 1914.

Patented Apr. 20, 19115.

2 SHEETS-SHEET 2.

atl'omm a n. N. w c m H w m T M. m o H P s R E T E P R R o N E m WILLIAMT. OI-IABJA, OF SPOKANE, WASHINGTON.

saw-FILING DEVICE.

Specification of Letters Patent.

Patented Apr. 249, 1215.

Application led April 27, 1914. Serial No. 834,725.

T0 all 'whom it may concern.'

Be it known that l, WILLIAM T. OHARA, a citizen of the United States,residing at Spokane, in the county of Spokane and State of Washington,have invented new and useful Improvements in Saw-Filing Devices, cfwhich the following is a specification.

My invention relates t0 improvements in machines for filing saws and itcomprises a novel construction, combination and arrangement of partshereinafter described and claimed.

lt furthermore provides a saw filing machine which is simple inconstruction, practical in use and capable of filing a saw with abellied or straight edge. Y

Further features of this invention will be set forth by the followingdescription taken in conjunction with the drawings annexed hereto andwhich form a part of this speci-l fication, and in which Figure 1illustrates in side elevation a saw filing machine constructed accordingto my invention. Fig. 2 illustrates in side elevation and partly insection, the device for holding the file. Fig. 3 is a section on theline 3 3 of Fig. 1. Fig. 4 is a view in end elevation looking in thedirection of the arrow 2 shown in Fig. l. Fig. 5 is an enlarged detailview of that portion of the device inclosed by the lines 5 5 of Fig. 3.Fig. 6 is a section on the lines 6 6 of Fig. 2. Fig. 7 is a section onthe lines 7 7 of Fig. 4. Fig. S is a plane view of the adjusting dialshowing the file guides at right angles with the carriage track.

rl`hroughout the separate views the same part is designated by the samereference character.

The preferred embodiment of saw filing machine as illustrated in thedrawings and constructed according to my invention, comprises acombination of one 0r more suitable clamps 1 1 adapted to secure thedevice to a table or work bench, said clamps being connected together bythe member 2 secured to the said clamps by the rivets 3 and having theends 4 thereof bent at right angles to the main portion for a purposewhich will be hereinafter fully set forth.

Secured to the member 2 by means of the rivets 5 and situatedintermediate of the clamps 1 1 is the track hanger 6 and oppositelythereto and secured to a projection carried by the said clamps 1 1 is asimilar track hanger 6, each of said hangers carrying at their upperends a seat 7 and 7 respectively, suitably adapted to support the trackmembers 8. At each end of the saw filing device is secured a bifurcatedmember 9, each of said members having the arms thereof secured at theupper end to the tracks 8 by means of collars 10 and having the lowerends adjustably slidable in the vertical slots 11 carried in the ends 4of the member 2, which ends have marked thereon a suitable scale 12, itbeing possible, by means of the screw and thumb nut arrangement 13, tosecure in any desired position, theends of the bifurcated members 9 sothat a warp or bow may be' pnt in the tracks 8 8 if it is wished'to filea saw in the bellied form. Also at each end of the saw iiling machineand secured to the members 2 are the upright arms 14 carrying at theupper ends thereof clamping jaw 15 continuously extending between saidmembers- 14 and having in the face thereof a resilient strip of frictionmaterial 15a, such as rubber or the like. The 'said clamping jaw andstrip coperate with a similar jaw and strip 14 and 15, respectively,carried by the U- shaped members 16 pivoted at 17 to the upright arms14, the members carrying the jaws 15 and 15 forming a vise, by means ofwhich the saw 18 may be secured in the machin-e without danger ofmarking or marring it, and the device is clamped after the saw has beenplaced in the position. shown in Fig. 3, by means of the cams 16 carriedby the shaft 19, said cams bearing on the said members 16 and forcingthe clamping jaw 15 toward the jaw 15, said shaft 19 being journaled asshown at 20 and operated by means of a lever 20.

1t will be evident that thus far the device is complete except as to thearrangement of parts for ling the saw. For this purpose a slidablecarriage 21 is mounted on the tracks 8 8 and has incorporated therein anadjustable jaw 22 running on one cf the tracks 8 and having the thumbscrew device 23 by means of which the tension of said jaw may beadjusted to prevent it from sliding too easily along the tracks 8 8. Inthe top plate 24 of the said slidable carriage 21 is pivoted therevoluble protractor plate 25 having mounted thereon inverted U-shapedguides 26 to guide the member 27 carrying the file 28.

The member 27 is constructed in substantially the same form as thewell-known hack saw, eXcept that in Vplace of the usual means forholding the saw in place, it has at being regulated by means of the ring31 bearing on the working surface 32 of the jaws of the chuck.

V'For the purpose of properly moving the carriag`J 21 along the tracks 88 the outer track is provided on its bottom with rack teeth 34, bestshown in Fig. 7, and the clamping member 22 of the carriage 21 carries adependent member 35 having a U- shaped cross section, and havingjournaled therein a gear 36 carried on the shaft37 mounted in saiddependent member 35 and Y in such a position that the teeth of said gearengage the teeth 34 carried by the said tracks 8. Also mounted on theshaft 38 and carried by the dependent member 35 is the small-gear 39meshing with the large gear 36. The shaft 38 carries on its outer end aratchet wheely 40.k Loosely mounted on the outside of the dependentmember 35 is a handle`41 and it may be preferably mounted as shown on anextension on the shaft 38. This handle carries a multiplicity of pawls42 adapted to engage the ratchet wheel 40, which in turn, when thehandle-41 is operated, imparts movement to the gear 36 engaging theteeth 34'on the track 8 and thereby moves the carriage 21, which issecured to the dependent member 35, along the tracks 8 8. However, forthe purpose of limiting the movement of the handle 41 two projectinglugs 43 and 43 are provided on the surface of the said dependent member35, and for further allowing the operator of e the saw filing machine tolimit the movement of the said carriage 21, the said projecting lug 43is made removable and a seriesof holes 44 are provided in the side faceof the 'member 35, thus it will be seen that the lug 43 may be placed inany one of the said holes 44 thereby regulating the movement of the saidhandle 41 and carriage 21 cooperatively acting therewith.

It will be evident that the operation' of the device is extremelysimple, it only being necessary for the operator to clamp the sawbetween the members 15 and 15 at the proper height, then set the lug 43in the proper hole suited to the gage of the saw and reciprocate themember 27 carrying the file 28. After each reciprocation thereof thehandle 41 should be operated to move the carriage 21 in the properposition to file the neXt tooth. The angularity of the file with respectto the longitudinal edge of the saw must also 'be set by means of theprot'ractor carried in the top plate 24 of the carriage 21. When the endof the saw is reached, the saw is reversed and the carriage set back,and the operation is repeated until the saw is completely filed.

Of course it is to be understood that I do not limit myself to thespecific combination and arrangement of parts herein set forth anddescribed, but I resort to such modiications in practical use as fallwithin the scope of my invention as dei'ined by the appended claims.

Having thus described my invention, what l claim is 1. A saw filingmachine, comprising in combination, a plurality of suitable clamps forsecuring said machine in position, a connecting member for said clamps,an adjustable vise carried by said connecting member, means foroperating said vise, one or more tracks, supports for said trackssecured to said connecting member, a movable carriage mounted on saidtracks, reciprocating means carried by said movable carriage andadjustable with respect thereto for filing the saw, and means for bowingsaid tracks whereby said saw may be led with a bellied cutting edge.

2. A saw iiling machine, comprising in combination, means adapted tosecure the saw in position, tracks adapted to support a movablecarriage, a movable carriage mounted on said tracks, means carried bysaid tracks for filing the saw, and means for bowing said tracks wherebysaid saw may be filed with a bellied cutting edge.

3. A' saw filing machine, comprising in combination, means for securingsaid machine in position, means for securing said saw in position,tracks normally parallel to the cutting edge of said saw, a saw iilingdevice mounted on said tracks and movable with respect thereto, andmeans for distorting said tracks whereby said saw may be filed with abellied cutting edge.

4. A saw filing machine, comprising in combination, means for holdingthe saw in position, a movable iile carriage, a file holder mounted onsaid carriage and adapted to move transversely of said saw edge, andmeans whereby said saw may bc filed with 'a belliedcutting edge.

ln testimony whereof l aiiix my signature in the presence of twowitnesses.

VlLLIAM T. OHARA.

Witnessesz HAROLD SCANTLEBURY, EDNA BnoYLus.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

